secureswitools/swisistools/source/sisxlibrary/basefile.h
author Simon Howkins <simonh@symbian.org>
Mon, 22 Nov 2010 12:04:39 +0000
branchRCL_3
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permissions -rw-r--r--
Adjusted to avoid exports, etc, from a top-level bld.inf
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/*
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* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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* Note: This file may contain code to generate corrupt files for test purposes.
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* Such code is excluded from production builds by use of compiler defines;
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* it is recommended that such code should be removed if this code is ever published publicly.
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* These streams use memory for storage. If data becomes huge, they will need amending to use temporary files.
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*
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*/
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/**
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 @file 
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 @internalComponent
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 @released
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*/
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#ifndef __BASEFILE_H__
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#define __BASEFILE_H__
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#include "utility_interface.h"
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#include <sstream>
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#include "basetype.h"
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class TSISStream
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	{
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public:
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	typedef unsigned int	size_type;
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	typedef int				pos_type;
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public:
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	/**
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	 * Default constructor
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	 */
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	TSISStream ();
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	/**
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	 * Destructor
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	 */
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	~TSISStream ();
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public:
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	/**
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	 * Read the content from the stream.
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	 * @param aBuffer buffer to which data needs to be read.
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	 * @param aSize size of data to be read.
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	 */
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	void read (TUint8* aBuffer, const size_type aSize);
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	/**
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	 * Write the content into the stream
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	 * @param aBuffer from which the data needs to be written to the stream
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	 * @param aSize amount of data needs to be written.
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	 */
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	void write (const TUint8* aBuffer, const size_type aSize);
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	/**
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	 * @return returns the current stream pointer.
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	 */
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	pos_type tell () const;
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	/**
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	 * Seek the stream pointer.
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	 * @param aPos offset by which the pointer needs to be moved.
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	 * @param aRel From where the offset needs to be moved.
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	 */
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	void seek (const pos_type aPos, const std::ios_base::seekdir aRel = std::ios_base::beg);
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	/**
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	 * @return stream length
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	 */
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	size_type length () const;
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	/**
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	 * Write the content of the stream into the file.
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	 * @param aFile file handle.
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	 */
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	bool exportfile (HANDLE aFile);
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	/**
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	 * Read the content from the file and write it into the stream
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	 * @param aFile file handle
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	 * @param filesize file size to be read.
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	 */
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	bool import (HANDLE aFile, TUint64* filesize = NULL);
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	/**
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	 * Reset all read-write pointers
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	 */
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	void reset ();
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	/**
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	 * @return buffer pointed by the stream.
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	 */
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	const TUint8* data () const;
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	/**
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	 * @return Maximum buffer size allocated to this stream
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	 */
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	static TUint64 MaxBufferSize ();
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private:
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	void reserve (const size_type aSize);
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private:
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	TUint8*				iBuffer;
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	size_type			iSize;
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	size_type			iDataLength;
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	pos_type			iOffset;
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	static size_type 	iChunk;
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	};
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inline TSISStream::pos_type TSISStream::tell () const
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	{
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	return iOffset;
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	}
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inline TSISStream::size_type TSISStream::length () const
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	{
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	return iDataLength;
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	}
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inline const TUint8* TSISStream::data () const
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	{
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	return iBuffer;
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	}
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inline TUint64 TSISStream::MaxBufferSize ()
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	{
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	return UINT_MAX;
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	}
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inline TSISStream& operator >> (TSISStream& aFile, TUint8& aValue)
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	{
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	aFile.read (reinterpret_cast <TUint8*> (&aValue), sizeof (TUint8));
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	return aFile;
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	}
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inline TSISStream& operator << (TSISStream& aFile, const TUint8 aValue)
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	{
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	aFile.write (reinterpret_cast <const TUint8*> (&aValue), sizeof (TUint8));
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	return aFile;
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	}
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inline TSISStream& operator >> (TSISStream& aFile, TUint16& aValue)
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	{
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	aFile.read (reinterpret_cast <TUint8*> (&aValue), sizeof (TUint16));
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	return aFile;
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	}
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inline TSISStream& operator << (TSISStream& aFile, const TUint16 aValue)
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	{
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	aFile.write (reinterpret_cast <const TUint8*> (&aValue), sizeof (TUint16));
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	return aFile;
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	}
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inline TSISStream& operator >> (TSISStream& aFile, TUint32& aValue)
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	{
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	aFile.read (reinterpret_cast <TUint8*> (&aValue), sizeof (TUint32));
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	return aFile;
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	}
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inline TSISStream& operator << (TSISStream& aFile, const TUint32 aValue)
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	{
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	aFile.write (reinterpret_cast <const TUint8*> (&aValue), sizeof (TUint32));
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	return aFile;
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	}
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inline TSISStream& operator >> (TSISStream& aFile, TInt32& aValue)
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	{
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	aFile.read (reinterpret_cast <TUint8*> (&aValue), sizeof (TInt32));
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	return aFile;
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	}
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inline TSISStream& operator << (TSISStream& aFile, const TInt32 aValue)
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	{
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	aFile.write (reinterpret_cast <const TUint8*> (&aValue), sizeof (TInt32));
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	return aFile;
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	}
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inline TSISStream& operator >> (TSISStream& aFile, TUint64& aValue)
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	{
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	aFile.read (reinterpret_cast <TUint8*> (&aValue), sizeof (TUint64));
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	return aFile;
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	}
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inline TSISStream& operator << (TSISStream& aFile, const TUint64 aValue)
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	{
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	aFile.write (reinterpret_cast <const TUint8*> (&aValue), sizeof (TUint64));
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	return aFile;
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	}
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#endif // __BASEFILE_H__
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